"Snappest" is an informal term that can be used to describe something that is the most stylish or trendy. Its synonyms include "freshest", "coolest" and "most fashionable". One could also use the words "chicest", "snazziest", or "hippest" as alternatives. "Slickest" could also work, as it has a connotation of smoothness and sophistication. Other words that could be used to describe the "snappest" look or trend could include "edgy", "avant-garde" or "cutting-edge". Ultimately, it depends on the context and the intended meaning, as different synonyms could emphasize different aspects of what it means to be "snappest".